We have a tropical aquarium (24"x12"x12", internal Eheim filter) which until today had an angel, two zebra danios and a guppy. They were moved into this tank about a week ago and all seemed peaceful and settled.
Today, we introduced 12 small neon tetras. We kept the lights and air pump off, but as soon as they were added, the angel and danios started chasing them around. The angel seems to have got bored with that fairly quickly, but seven hours later, the danios are still chasing them around. I haven't actually seen them attack a neon, but they chase them around, and charge into the middle of the shoal a lot.
Is this normal? I thought danios were fairly peaceful fish. They always were before!
Thanks for any advice you can give.
Today, we introduced 12 small neon tetras. We kept the lights and air pump off, but as soon as they were added, the angel and danios started chasing them around. The angel seems to have got bored with that fairly quickly, but seven hours later, the danios are still chasing them around. I haven't actually seen them attack a neon, but they chase them around, and charge into the middle of the shoal a lot.
Is this normal? I thought danios were fairly peaceful fish. They always were before!
Thanks for any advice you can give.